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Transformer oil is a dielectric fluid mainly used in oil filled electrical transformers as an insulating and cooling medium. It is usually obtained by fractional distillation and subsequent processing of crude oil. The primary purpose of transformer oil is to insulate and cool the transformer windings and core. These also preserve the core and winding as these are fully immersed in the oil and prevent contact of oxygen with the cellulose paper insulation of windings, which has high affinity towards oxidation. Three basic types of transformer oil used are mineral oil (mostly naphthenic), silicone, and bio-based. Mineral oil based transformer oils dominate the consumption as it has good electrical and cooling properties, and provides cost-effective solution.The report segments the market based on geography (
Asia-Pacific,
North America,
Europe, ROW); types (mineral oil–naphthenic and paraffinic, silicone, and bio-based); and applications (small transformers, large transformers, and utility), and provides market forecast in terms of consumption (thousand liters) and revenue ($million) for aforesaid segments.The global transformer oil market revenue is estimated to reach
$2.46 billion by 2017. Major factors responsible for market growth include increasing power requirements in developing regions, rising investments, enlargement of electricity grids in developed regions and rising transition towards renewable energy resources. The key concerns in the industry pertain to the corrosive nature of sulfur present in transformer oil and flammable nature of mineral oil based transformer oils. Transformer manufacturers have started using bio-based oil which has higher dielectric strength and flash point, and lower pour point.The report classifies and defines the consumption of transformer oils in the electrical equipment industry. It covers qualitative data about transformer oil properties and its functions. The report also provides a comprehensive review of major market drivers, restraints, opportunities, winning imperatives, and key burning issues in the market. Key players of the industry are profiled in detail with their recent developments and other strategic initiatives. Some of these include Nynas (
Sweden), Ergon (U.S.), PetroChina (
China), Calumet (U.S.), and San Joaquin Refining (U.S.).

RISING CONSUMPTION OF BIO-BASED TRANSFORMER OILSIncreasing frequency of fire accidents in mineral oil based transformers and its non-biodegradable nature has led to an increasing consumption of bio-based transformer oils, which are incombustible and non-toxic in nature. The industry is observing a high rate in adoption of bio-based transformer oil due to these aspects; lately its growing preference is also observed globally.Bio-based transformer oil is being used in large number of transformers mainly in the North American region due to its excellent insulating and biodegradable nature of the oil. Other attributes leading to high acceptability have been better performance and economic advantage over mineral oil-based transformer oils. Bio-based oils have high fire point, provides increased service life to transformer, and very low cost for spill remediation due to high biodegradability. Bio-based transformer oil is 99% degraded in 21 days. The consumption of bio-based oils is expected to increase at promising rate in the future. Hence, use of bio-based oils as insulating and cooling medium is expected to increase in the next five years.

SCOPE OF THE REPORTThe report analyzed global market in terms of consumption (thousand liters) and revenue ($million) for the aforesaid transformer oil types by regions and respective major countries; and applications.
By GeographyAsia-PacificNorth AmericaEuropeROW
By TypesMineral oilNaphthenicParaffinicSiliconeBio-based
By ApplicationsSmall transformersLarge transformersUtility